Trades: an open position shows no close price or P&L

Vest's position history gives an open position a placeholder close price
and a $0 P&L (290.25 on an NDX short at 29,538.96). Only a closed
position keeps them now — in the parser, in the stored row (a placeholder
already stored is cleared on the next read) and in the API.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/db.ts

@@ -652,8 +652,10 @@ export function saveTrades(rows: Omit<TradeRow, 'openedBy' | 'closedBy'>[]): voi
             quantity     = CASE WHEN excluded.quantity > 0 THEN excluded.quantity ELSE trades.quantity END,
             leverage     = COALESCE(excluded.leverage, trades.leverage),
             open_price   = COALESCE(excluded.open_price, trades.open_price),
-            close_price  = COALESCE(excluded.close_price, trades.close_price),
-            pnl          = COALESCE(excluded.pnl, trades.pnl),
+            close_price  = CASE WHEN COALESCE(excluded.closed_at, trades.closed_at) IS NULL THEN NULL
+                                ELSE COALESCE(excluded.close_price, trades.close_price) END,
+            pnl          = CASE WHEN COALESCE(excluded.closed_at, trades.closed_at) IS NULL THEN NULL
+                                ELSE COALESCE(excluded.pnl, trades.pnl) END,
             fee          = COALESCE(excluded.fee, trades.fee),
             funding      = COALESCE(excluded.funding, trades.funding),
             opened_at    = excluded.opened_at,

lib/vest-helpers.ts

@@ -313,9 +313,12 @@ export function parseHistoryPosition(raw: unknown): VestTrade | null {
     if (!p || typeof id !== 'string' || typeof p.symbol !== 'string') return null;
     const openedAt = toMs(p.openDate ?? p.open_date ?? p.createdAt ?? p.created_at);
     if (!Number.isFinite(openedAt)) return null;
-    const closedAt = toMs(p.closeDate ?? p.close_date);
+    const closedMs = toMs(p.closeDate ?? p.close_date);
+    const closedAt = Number.isFinite(closedMs) && closedMs > 0 ? closedMs : null;
     const openPrice = num(p.openPrice ?? p.open_price);
-    const closePrice = num(p.closePrice ?? p.close_price);
+    // An open position comes with a placeholder close price and a $0 P&L
+    // (seen: 290.25 on an NDX short at 29,538.96): only a close has them.
+    const closePrice = closedAt === null ? undefined : num(p.closePrice ?? p.close_price);
     const reason = p.closeReason ?? p.close_reason;
     return {
         positionId: id,
@@ -325,11 +328,11 @@ export function parseHistoryPosition(raw: unknown): VestTrade | null {
         leverage: num(p.leverage) ?? null,
         openPrice: openPrice !== undefined && openPrice > 0 ? openPrice : null,
         closePrice: closePrice !== undefined && closePrice > 0 ? closePrice : null,
-        pnl: num(p.pnl) ?? null,
+        pnl: closedAt === null ? null : num(p.pnl) ?? null,
         fee: num(p.fee) ?? null,
         funding: num(p.funding) ?? null,
         openedAt,
-        closedAt: Number.isFinite(closedAt) && closedAt > 0 ? closedAt : null,
+        closedAt,
         closeReason: typeof reason === 'string' && reason !== '' ? reason : null,
     };
 }